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Finding the Fourth Proportional to 408,783.08, 613,173.50 and 128,321.32

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Solution

The fourth proportional to 408,783.08, 613,173.50 and 128,321.32 is: 192,481.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,783.08 : 613,173.50 = 128,321.32 : x
  2. Step 2: Convert to fraction form
    408,783.08/613,173.50 = 128,321.32/x
  3. Step 3: Cross multiply
    408,783.08x = 613,173.50 × 128,321.32
  4. Step 4: Simplify right side
    408,783.08x = 78,683,232,909.02
  5. Step 5: Solve for x
    x = 78,683,232,909.02/408,783.08
  6. Step 6: Final answer
    x = 192,481.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.